38438661771 has 6 divisors (see below), whose sum is σ = 55522511460. Its totient is φ = 25625774508.

The previous prime is 38438661763. The next prime is 38438661791. The reversal of 38438661771 is 17716683483.

38438661771 is a `hidden beast` number, since 38 + 438 + 6 + 6 + 177 + 1 = 666.

It is not a de Polignac number, because 38438661771 - 2³ = 38438661763 is a prime.

It is a super-4 number, since 4×38438661771⁴ (a number of 43 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (38438661731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2135481201 + ... + 2135481218.

It is an arithmetic number, because the mean of its divisors is an integer number (9253751910).

Almost surely, 2^38438661771 is an apocalyptic number.

38438661771 is a deficient number, since it is larger than the sum of its proper divisors (17083849689).

38438661771 is a wasteful number, since it uses less digits than its factorization.

38438661771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270962425 (or 4270962422 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 38438661771 in words is "thirty-eight billion, four hundred thirty-eight million, six hundred sixty-one thousand, seven hundred seventy-one".